Flask-Admin view with many to many relationship model

Question

I have this basic flask-admin set-up with users and user roles

class Role(db.Model, RoleMixin):
    id = db.Column(db.Integer(), primary_key=True)
    name = db.Column(db.String(80), unique=True)
    description = db.Column(db.String(255))

class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(255), unique=True)
    password = db.Column(db.String(255))
    active = db.Column(db.Boolean())
    confirmed_at = db.Column(db.DateTime())
    roles = db.relationship('Role', secondary="roles_users",
                            backref=db.backref('users', lazy='dynamic'))
class RolesUsers(db.Model):
    __tablename__="roles_users"
    id = db.Column(db.Integer(), primary_key=True)
    user_id = db.Column(db.Integer(), db.ForeignKey('user.id', ondelete='CASCADE'))
    role_id = db.Column(db.Integer(), db.ForeignKey('role.id', ondelete='CASCADE'))

I want to display user view that will show roles specific user has. With one to many relationship I would do somethin like this

class UserView(ModelView):
    column_hide_backrefs = False

class Role(db.Model, RoleMixin):
    ...
    def __str__(self):
        return self.name

How would I do this with many to many relationship

Answer 1

So it turns out that I only needed to add column_list property to UserView like this

class UserView(ModelView):
    column_hide_backrefs = False
    column_list = ('email', 'active', 'roles')

the rest is handled by flask-admin